#include<iostream>
#include<sstream>
#include<algorithm>
using namespace std;
int main()
{
string line;
while (getline(cin, line))//输入一行存入line 如123 100 200
{
int sum = 0, x;
stringstream ss(line);//stringstream字符串流 ostringstream istringstream
while (ss >> x)
sum += x;
cout << sum << endl;//423
}
}
